A network administrator needs 10 prevent users from accessing the accounting department records. All users are connected to the same Layer 2 device and access the internal through the same router. Which of the following should be Implemented to segment me accounting department from the rest of the users?
a. Implement VLANs and an ACL.
b. Install a firewall and create a DMZ.
c. Create a site-to-site VPN.
d. Enable MAC address filtering.